subway saturation

Today I learned there are 10 Subways within walking distance of the Consumerist Bat Cave (Philadelphia Branch).

Is There Room For Another 8,000 Subway Locations? Subway Thinks So

The way things stand right now, there are around 26,000 Subway restaurants in the U.S., nearly twice the total number of McDonald’s in the country. In fact, Subway is larger than the number of eateries operated by 30 of the nation’s top 50 food chains — combined. And yet, claims the company’s top exec, there is still room to grow. [More]